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Canning altitude adjustments in Idaho
Idaho's featured towns sit about 2,140 to 4,730 ft — a spread that crosses 2 water-bath bands, so which town your kitchen is in genuinely changes the answer.
The lay of the land
Idaho splits cleanly in two for canning: Boise and Coeur d'Alene sit in the 1,001–3,000 ft band, while the upper Snake River Plain towns — Twin Falls, Pocatello, Idaho Falls — all work from the 3,001–6,000 ft band. Boise deserves your closer look: at about 2,820 ft it runs within 200 ft of the 3,000-ft line, and its foothill neighborhoods climb from there.
From Coeur d'Alene at about 2,140 ft to Idaho Falls at about 4,730 ft, Idaho crosses 2 water-bath rows — 5 added minutes at the bottom of the state, 10 added minutes at the top. Each band carries one published answer, so find your town's row before the jars go in.
| Town | Elevation | Water bath | Dial gauge | Weighted gauge |
|---|---|---|---|---|
| Coeur d'Alene | about 2,140 ft | +5 min | 12 lb | 15 lb |
| Boise | about 2,820 ft | +5 min | 12 lb | 15 lb |
| Twin Falls | about 4,140 ft | +10 min | 13 lb | 15 lb |
| Pocatello | about 4,450 ft | +10 min | 13 lb | 15 lb |
| Idaho Falls | about 4,730 ft | +10 min | 13 lb | 15 lb |
Town not in the table? The altitude lookup takes any Idaho ZIP or town and hands back the full card — elevation, minutes, and pressures in one look. Recipe already in hand? The processing time adjuster does the arithmetic on your minutes.
Frequently asked questions
Why do different Idaho towns get different canning numbers?
Because Idaho's featured kitchens climb from about 2,140 ft in Coeur d'Alene to about 4,730 ft in Idaho Falls — a spread that crosses 2 water-bath bands. Each band carries its own published answer, so the right move is reading your own town's row, not your neighbor's.
What would the same recipe look like in Coeur d'Alene versus Idaho Falls?
In Coeur d'Alene, a water-bath recipe takes 5 extra minutes, with a dial gauge at 12 lb. In Idaho Falls, the same recipe takes 10 extra minutes, and the dial climbs to 13 lb. Same recipe, different ground.
Is there one setting that covers all of Idaho?
On a weighted gauge, nearly: 15 lb covers every featured town, with times exactly as tested. Water-bath minutes and dial settings genuinely differ by town, though — match the row for where the canner actually sits.